boundary condition problem

shahab.ehsanfar · December 30, 2010, 14:06

I want to calculate pressure drop in a twophase flow problem, and no data on the outlet boundary is available. In FLUENT uses "outflow" boundary condition for such cases but I dont know what I shoud do in CFX for such cases.
Help me please.

cfdman · December 31, 2010, 03:24

Hi,

I think you can use "mass flow on inlet" and "pressure on outlet" boundary conditions. You can give "0 pa" to outlet because you only want to calculate pressure drop so it is not important to whatever you set for Outlet Pressure. It won't change the results.

shahab.ehsanfar · December 31, 2010, 09:32

Quote:

Originally Posted by cfdman

Hi,

I think you can use "mass flow on inlet" and "pressure on outlet" boundary conditions. You can give "0 pa" to outlet because you only want to calculate pressure drop so it is not important to whatever you set for Outlet Pressure. It won't change the results.

thanks a lot!

December 30, 2010, 14:06	boundary condition problem	#1
shahab.ehsanfar New Member shahab eh Join Date: Dec 2010 Posts: 3 Rep Power: 16	I want to calculate pressure drop in a twophase flow problem, and no data on the outlet boundary is available. In FLUENT uses "outflow" boundary condition for such cases but I dont know what I shoud do in CFX for such cases. Help me please.

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December 31, 2010, 03:24		#2
cfdman New Member Arda Ersan Join Date: Aug 2009 Posts: 13 Rep Power: 17	Hi, I think you can use "mass flow on inlet" and "pressure on outlet" boundary conditions. You can give "0 pa" to outlet because you only want to calculate pressure drop so it is not important to whatever you set for Outlet Pressure. It won't change the results.